Joseph palmer



@nitro tstrs dstrnt @fitta JOSEPH PALMER, or`coNcoRD,fNEW-nAMrsn1s.

LsfmPafem No. 'fameuses May 26, 186s. r

IMPROVEMENT IN WELDING THE BARS `Oli' ELLIPTIG SPRINGS.

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Be it -lcnorvn that I, IOSEPII PALMER, of" Concord, in the county ofMerrimaclc, and .State of New Hump-` shire, have invented a new. and improved Machine for Welding Ears for .French Heads for Elliptic Springs;

and I do hereby declare that the following isa fullland exact description thereof, reference being had to the ac'companyingdrawings, Amaking part of 'this specification, of which dran-ings Figure 1 is a front elevation of my machine, showing the position of the parts when the drop-hammer is at its highest elevation. Figure 2 is a front elevation of my machine, showing thev position of the parts when the drop-hammer 1s at its lowest depression. i

Figure 3 'is a view ofthe framework of my machine, with the slides and dies removed, to show the grooves in which said slides -and dies. operate.

Figure 4 is a perspective view of my machine, and thc separate parts thereof,s howing the upper and lower dies partially withdraivmond theslides and end-pieces employed in the construction of my machine.

On the 3d day of September, 1867, Letters Patent of the United States, imbered 68,454, were' granted and'issued to me, upon an improved die for making heads of elliptic sp1'ings,by the use of` which diecars are punchedof 'the required form, to be fixed on the ends of elliptic springspreparatory to welding.

i The inventiouupon lwhich Inorv seek to obtain Letters Patent is a machine for Welding ears upon the ends 0f. Such main leaf, for the purpose of making French heads to the same; and for the purpose of enabling others skilledin the art to malte and use my invention, I will proceed to describe its construction and, modo oi' operation.

The drop-hammer, marked A in Vthe figures, is operated by.meansof the pulley B, eausod to revolve by belting, and said hammer works vertically in a groove in the uprightst'andaras shown in the igure; but this portion' of the machine I do not claim as my invention. i

I cut a. dove-tail groove in the lower end lof the drop A i'rom front to rear, in which thedieC is fitted. The construction of this die C, and the manner in which I fit the same, is shown in iig. d, where the` e is shown partially withdrawn, forthe purpose of better illustration. The-lower face of said die C is shaped to:correspond with the upper or convex surface of my spring-head.

I'also construct the bottom die D as 'shown in the figures, and the upper surfuceof the same isf-shaped to 'correspond with the under or concave surface of my spring-head, arid the4 sides of this die are cut away to receive the ears, and this die is fitted i'na dove-tail groove in the bottom part of my frame, as shown in Iig. 4,

when the slide is seen partially withdrawn, for the purpose of better illustration.

yIhrough the drop, A, I pass the horizontal arms' E E, iig. 1, and to these horizontal arms I .attach tueren tical Wedges F F,tig.1,which wedges, it will be scen,must move withthe drop These wedges may be adjusted' at any distance from each other required by' thefwork to be done,.and are held in place by' keys or set-screws.

From right to left, through the bottom of my framework, I cut the clove-tailgroovc, as shown in fig., 3, from Gr to G, which groove is intcrsected at right angles by the dove-tail groove shotvn at H, g. 3.

.Inthis groove, Gr Gr, I t the slides a b c d, figs. 1, 2, and 4. Said slides and the construotionthercof are shown in perspective at a Z1 c d, g. 4. 'l

I construct the end-pieces I I, figs. 1, 3, and 4, which t respectively in the vertical dove-tail grooves in.

the ends of the bottom frame, one of which is shown at K, g. 4.

And insaid end-pieces I adjust the set-screws, shown in the -figures; and in'the slides b c, iig. 4, I place' the spiral springs, shown in the figures; and the use of said set-screws 'and spiral springs I will hereafter more fully explain.

I use with my machine various sets of dies, C and D, of various sizes, according'to the work `to be donc, but

the dove-tails of alL said dies are alike, to fit the grooves referred toso that they may be cssilyladjusted or Withdrawn at pleasure; and figs. 1 and 2 show my machine with-al1 the partsin place and-ready for ,worin To illustratc'the operation of my machine, I will suppose I lieve to weld the eers upon the main leaf of an elliptic spring-say, an inch and a quarter spring.

The cars being struck by the right |:md left dies, describedl in my Letters Patent o fSeptember 3, 1867, I place said cnrs upon the ends 'of the mninleaf; and by n. blow of the hammer upon the lips-upon seid cars, `tbey' are heldsuiliciently` tight to prevent their dropping oil in the furnace. The eers, and. end of the leaf to'wliich they are to be welded, nrc then placed in the furnace, and heated to the proper point for Weldinv.

I insertin the drop A the upper die C, of the proper size, and in the groove H, in the bed-plete, I place, the lower die D, corresponding with said u'ppcr die.

By means oi' the slet-screws in the end-pieces I I, I adjust the slides so se to give the necessary spncc between the die G end the slides b and c, or either thereof, respectively, and the spiral springs ect vto"hold the slides I1 `:md-cA apart from the die C when the hammer rises.

I adjust the Wedges upon the horizontal arms so that the points there-ei wiil be directly over the lips between the slides a and b and c and d, respectively, ns shown in iig. 1. l

When ready for'welding, I place my' Ispring-bend, concave surface down, npon the bottom die D, the ears fitting into the spaces on either side of said die, as before explained, prepared for their reception;

I then set the ina-chine in motion by means of a. tightening-pulley. The drep descends,andtl1e wedges F F are drawn between the slides a. and I) and c and d, thus giving a -veriical blew from the drop, and n. lateral blow from each side, et the same moment oftime. i i

The wedges F F are made of steel, and all the other parts of my machine may be made of cest iron'.

The spring-head being subjected to the action of Vmy machine for e fewvseconds, the machine isstopped and the spring withdrawnfand the Welding will be completed and the spring-headformed with greater accuracy and vin a. better :rnd more substantial manner than thcsnmc work can be done by hand, and et a savngof ninetcnths of the time. l

Wlhnt I claim as my invention, and desire'to secure by Letters Patent, is r The combination of the wedges F F, the drop A, the upper end lower (lies G D, the slides a, b c d, endendpieces I I, all constructed and arranged as shown, and by means of which vertical and lateral blows are given nt the suine time, for the purpose set'ferth.

J OSEPH PALMER. Witnesses:

H. W. STVENS, An'rnun Fms'rcunm 

